346 BRYACEiE. [nypnum. 



ii. 319. Brachythecium plumosum^ Bruch & Scliimp, Bryol. 

 Eur. t. 537. 



Var. homomallum. Small; branches falcate: leaves 

 secund, narrower : cai^sule small, ovate. — Bruch & Schunp. 

 1. c, as Brachythecium. 



Hab; Moist rocks in mountains, and borders of waterfalls; South and 

 North; common and variable. 



More robust than the last, with broader and shorter-acuminate leaves, 

 dirty yellow; capsule longer; habitat subaquatic. 



Subgenus IX. SCLEROPODIUM. 



Habit and mode of growth of Brachythecium. Areolation 

 still narrower vermicular, much enlarged and hyaline at the de- 

 current base. Flowers dioecious. Capsule suberect or cernuous, 

 oblong-cylindrical or ovate, more or less incurved. Pedicel 

 rough. Teeth of the peristome lamellate on the inside; seg- 

 ments split on the keel; cilia two or three, as long as the 

 segments, appendiculate. Annulus double. — Scleropodium, 

 S chimp. 



59. H. CSBSpitosum, Wils. Densely cespitose, the tufts 



bright or dirty green, soft; stems rooting, densely ramulose; 



branchlets erect or incurved: leaves soft, open or subsecund, 



loosely imbricate when dry, ovate-lanceolate, acuminate, those 



of the branches oblong-lanceolate, acute or blunt at the apex, 



all concave, minutely serrulate all around, costate to above the 



middle, the costa sometimes forking : capsule suberect, oblong- 



subcylindrical, slightly incurved ; operculum convex, rostellate, 



— Engl. Bot. Suppl. t. 2878, and Bryol. Brit. 344, t. 55. 



Scleropodium ccBspitosum, Bruch & Schimp. Bryol. Eur. t. 556. 



Hab. On the ground, and upon shaded rocks among redwoods, Cali- 

 fornia {Bolander)\ Alaska (Kellor/g); not common. 



60. H. Californicum, Lesq. Differing evidently from the 

 Inst in its loosely intricate tufts and slender stems with long 

 filiform branches: leaves ovate-lanceolate, more or less Ions:- 

 pointed, mostly entire, rarely or slightly serrulate at the apex; 

 the costa longer, vanishing below the apex ; basilar cells more 

 numerous, small, nearly square, generally filling the whole base 

 of the leaves: capsule longer, cylindrical-oblong, pale green, 

 subcernuous; pedicel longer, rough and reddish in the upper 



